Discussions

I already posted on reddit, but they haven't been much help: http://www.reddit.com/r/Multicopter/comments/20in0e/just_built_my_first_quadcopter_using_the_hunter/

Here is my quad: http://i.imgur.com/Ky3US7c.jpg

Video: https://www.youtube.com/watch?v=ak8H8lQZi28

I lowered the minimum throttle below that which is needed for the motors to spin. I noticed that when it's yawing, the diagonal props aren't rotating (FR,BL or FL,BR).  

I've been messing with the YAW PID gains - just arbitrarily adjusting them one at a time to see if anything helps - no dice. I have telemetry, so I can change parameters without having to unplug power, bring copter to computer, plug in, set parameter... anyway, telemetry is awesome :-)

For clarification, the gps/compass module is supposed to point in the same direction as the APM, yeah?

I noticed that in the config, when I set the APM to use the extermal compass, it puts a 180 degree roll on the compass orientation, is that correct? I guess if it was configured to be backwards, the yaw problem could be the quad trying to rotate to face behind itself.

Anyone else had this problem?

Note: I don't think it has anything to do with my motor mixing, or propollers. My motors and props are correct, and I compiled new motor mixing. (commented out everything in here that wasn't needed for my vtail - https://github.com/NullVoxPopuli/ardupilot/blob/master/libraries/AP_Motors/AP_MotorsQuad.cpp)